NEETBiologyPrinciples of Inheritance and VariationMCQ+4 / −1
A normal woman, whose father was colour-blind
is married to a normal man. The sons would be :-
- AAll colour-blind
- B75 % colour-blind
- CAll normal
- D50% colour-blind
View written solutionFree
Correct answer: D
In question, where the genotype of the other
parent is not mentioned then that should be considered
normal. Colour blindness is a recessive sex- linked
trait
(i) To find out the genotype of a woman.
Her father is colour-blind \ his genotype is XcY and
her mother is normal so her genotype is XX.
(ii) When this woman marries normal man
50% of the sons would be colour blind.
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